Air flows over a 3 m long flat plate. experimental measurements show the boundary layer remains laminar over the length of the plate. (a)-determine the fastest likely velocity for laminar flow (re 5x10) (b)-determine the boundary layer thickness for this condition (c)-would a lower velocity increase or decrease the boundary layer thickness? explain your answer. (d)-what is the total drag on the plate (both sides) if the plate is 10m wide. (e)-what is the displacement thickness of the boundary layer at the end of the plate.

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?

Technician a says that in a worm gear steering system, most excessive steering free play is usually found in the gearbox. technician b says that in a rack-and-pinion steering system, excessive free play can be found in the bushings. who is correct?

Not a characteristic property of ceramic material (a) high temperature stability (b) high mechanical strength (c) low elongation (d) low hardness